Electric water heater



` Feb`.10. 1925 J. MCCORMICK ELECTRI C WATER HEATER Filed July 5, 1923 Patented Feb. l0, 1925.

UNITED STATES JOHN Meccanica, or o/r'rawa, oN'rAmo, CANADA.

ELECTRIC WATER HEATER.

Aplpuoauon and July s,

Tc alt whom it may concern:

Be it known that I, JOHN McConMIcx,

.a subject of the King` of Great Britain, and

ithis character at can be readily marketed in lar e aantities at low" cost.

Wit t ese and other objects in view, the inventionconsists essentially in the novel construction and arrangement of parts as described in the present specification and illustratedby the accompanying drawings which form a part of the same.

Referring now to the drawings in which like characters of reference indicate correspending parts in each figure:

Figure 1 is an enlarged view of an embodiment of my invention.

Figure 2 is a vertical section.

Figure 3 is a top plan view showing the arrangement of the electric switch.

In the drawings, A designates the device as a whole, comprising an outer tubular member connected through a water supply pipe 11 with a tank or the like and pro- 'vided at the top with the return water p ese pipes extend throu h caps 13 and 14 on each end of the tubu ar member 10, the ipe connections being suitably insulated at t e connectin points 15 and 16,

Within the tu ular member I provide a Second tube 17 and within the tube 17 a further tube 18 of lesser diameter. The tubes are insulated from one another at each end by suitable insulating plates 19 and 20, into which they fit and which :ire arranged adjacent each end in the tube, so as to provide between them and the end caps 13 and 14 suitable spaces 21 and 22.

These insulating lates 19 and 2O are provided with a plura ity of openings 23 and 24, whereby the water frculates from the 22 into the tubes and ther into the space 21, and so on.

in Electric Water Heaters, ot

1923. Serial No. 849,643.

The tubes 10, 17 and 18 are designedyto form electrodes and for this purpose I-provide binding posts 29 and 29 on the outer tube, connected to binding and Q7 60 for the intermediate tube 1 and the inner tube 18, respectively. 31 is a binding post on the cap 14, connected to a lead 32 interrupted by a switch 33, adapted to contact with the lead connected to the bind` 05 post 29, the binding post 29l bein conn to a lead 26. The posts 29 and v2 are suits ably insulated at 9 from the tube 10.

9 are a pluirality of holes in the inner tube for the water to circulate through. c

In operation it will be seen that in fhg arrangement of the wiring when the 33 is 1n the position as shown in Irignmcontacting with the lead 32 at 35, the 0171138!"V l?. tube 10 und the inner tube 17 will be elle?,- 75 gizcd, that when the switch is moved to con' tact with the points 34 and 35 the threetubes 10. 17 and 18 will.be heated, while on the switch being further moved to contact only with the point 34, the outer tube 10 and the innermost tube 18 fvill be heated.

These tubes, as previously mentioned, are completel insulated from one anothe: through t. e insulating plates 19 and 20, and therefore the water circulating therein forms/35 the resistance to convey `the current, an thus materially increases the eliicency and economic operation of my heater.

36 is ,a suitable stand' for the heater, insulated therefrom, formed integral with the` cap.

37 is a tap in the pipe 11 for draining the sediment.

The tube 1() is preferably provided on the outside with a suitable covering of insulating material, so that the heater can be readily handled.

It may be mentioned that the inner tube 17 is vcont.nual1y heated, and the switch 33 is operated to heat, in addition, the outer tube and the innermost tube As many changes could be made in the above construction and many apparently Widely dierent embodiments of my invention, within the scope of the claims, constructed without departing from the spirit or scope thereof, it is intended that all matter contained in the accompanying specication and drawings shall be interpreted as illustrative and not a limiting sense.

WhV t I claim as J invention is:

1. s' i electric er heater comprising a and an inner spaced tubljelectrode havin binding posts attheir up tend connecte to the side binding posts, gbinding post on the cover of the container, nsulang plates at each end on said electrodes, openings in said plates, adapted for the water to circulate therethrough, water intake and dis` charge means on the top and bottom of the heater, respectively, a lurality of orifices in the intermediate tuliie, adapted for the circulation of water therethrough.

2.`A.n electric heater of the character described com risingr a plurality of ed tube elect es, screw cap means at eac 'end ofthe outer tube, water intake and discharge means in said caps, the intermediate and in ner of said electrodes extending adjacent the top of the outer tube electrode, insuliitin plates for said electrodes, and water cir` c ating means in said electrodes, whereby on the tubes being) charged the water forms a resistance, side inding posts on the outer electrode, and binding posts on the inteimediate and inner tube electrode, connected to said binding posts, a binding post on the cover of the outer tube electrode, and means for electrically connecting the binding posts to the source of power, and switch means for charging the tube electrodes separatel or collectively and for controlling the charg. of said tubes. 3. im electric heater of the character described com risingI a suitabl insulated casing, a plura ity of spaced tubes in said casing, adapted to form electrodes, top and bottom cup means having water intake and discharge means thereinv for tlic outer tube, binding posts for the outer tube, communieating with binding,r posts on the. top of the.

intermediate and inner tube, and `water circuliitin orifices in the intermediate tube, insulating plates for said tubes, and water circulating orificesin said plates, a tfhird binding post for the heater, and means coniiecting said binding post with switch means!` and means connectingA the side binding posts with said' switch means, wliereb the tubes are charged separately or collectively.

In witness whereof I have hereunto setl my hand in the presence of two witnesses.

J QHN MCCORMICK. 

